This review discusses experimental results about supported metallocenes, used in ethylene and/or propylene polymerization, on inorganic (SiO₂, Zeolites) and biopolimeric supports (cellulose, chitosan and starch). Two different metallocenes have been evaluated: (Cp₂ZrCl₂ and EtInd₂ZrCl₂). The role of Lewis acids (AlCl₃) and bases (Ethyl Benzoate) on the activity of SiO₂ supported catalysts were studied. The ZSM5 zeolite support was analyzed taking into account the influence of acidic properties on the catalysts performance. The biopolymeric supports are an interesting alternative to more conventional supports.